// This validates known address types, unknown types fall through
			// and do not get validated.
			switch addrType {
			case discovery.AddressTypeIPv4:
				allErrs = append(allErrs, validation.IsValidIPv4Address(addressPath.Index(i), address)...)
				allErrs = append(allErrs, apivalidation.ValidateNonSpecialIP(address, addressPath.Index(i))...)
			case discovery.AddressTypeIPv6:

				}
			}

			errs = IsValidIPv4Address(field.NewPath(""), tc.in)
			if tc.family == 4 {
				if len(errs) != 0 {
					t.Errorf("expected %q to pass IsValidIPv4Address but got: %v", tc.in, errs)
				}
			} else {
				if len(errs) == 0 {
					t.Errorf("expected %q to fail IsValidIPv4Address", tc.in)
				}
			}

			errs = IsValidIPv6Address(field.NewPath(""), tc.in)

		allErrors = append(allErrors, field.Invalid(fldPath, value, "must be a valid IP address, (e.g. 10.9.8.7 or 2001:db8::ffff)"))
	}
	return allErrors
}

// IsValidIPv4Address tests that the argument is a valid IPv4 address.
func IsValidIPv4Address(fldPath *field.Path, value string) field.ErrorList {
	var allErrors field.ErrorList
	ip := netutils.ParseIPSloppy(value)
	if ip == nil || ip.To4() == nil {